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 <h1 class="title">Variable handling 函数</h1>

 































































































































































































  
































































<h2>目录</h2><ul class="chunklist chunklist_reference"><li><a href="function.boolval.html">boolval</a> — 获取变量的布尔值</li><li><a href="function.debug-zval-dump.html">debug_zval_dump</a> — Dumps a string representation of an internal zval structure to output</li><li><a href="function.doubleval.html">doubleval</a> — 别名 floatval</li><li><a href="function.empty.html">empty</a> — 检查变量是否为空</li><li><a href="function.floatval.html">floatval</a> — 获取变量的浮点值</li><li><a href="function.get-debug-type.html">get_debug_type</a> — Gets the type name of a variable in a way that is suitable for debugging</li><li><a href="function.get-defined-vars.html">get_defined_vars</a> — 返回由所有已定义变量所组成的数组</li><li><a href="function.get-resource-id.html">get_resource_id</a> — Returns an integer identifier for the given resource</li><li><a href="function.get-resource-type.html">get_resource_type</a> — 返回资源类型</li><li><a href="function.gettype.html">gettype</a> — 获取变量的类型</li><li><a href="function.intval.html">intval</a> — 获取变量的整数值</li><li><a href="function.is-array.html">is_array</a> — 检测变量是否是数组</li><li><a href="function.is-bool.html">is_bool</a> — 检测变量是否是布尔值</li><li><a href="function.is-callable.html">is_callable</a> — 验证值是否可以在当前范围内作为函数调用。</li><li><a href="function.is-countable.html">is_countable</a> — Verify that the contents of a variable is a countable value</li><li><a href="function.is-double.html">is_double</a> — 别名 is_float</li><li><a href="function.is-float.html">is_float</a> — 查找变量的类型是否是浮点型</li><li><a href="function.is-int.html">is_int</a> — 检测变量是否是整数</li><li><a href="function.is-integer.html">is_integer</a> — 别名 is_int</li><li><a href="function.is-iterable.html">is_iterable</a> — Verify that the contents of a variable is an iterable value</li><li><a href="function.is-long.html">is_long</a> — 别名 is_int</li><li><a href="function.is-null.html">is_null</a> — 检测变量是否是 null</li><li><a href="function.is-numeric.html">is_numeric</a> — 检测变量是否为数字或数字字符串</li><li><a href="function.is-object.html">is_object</a> — 查找变量是否是字符串</li><li><a href="function.is-real.html">is_real</a> — 别名 is_float</li><li><a href="function.is-resource.html">is_resource</a> — 查找变量是否为资源</li><li><a href="function.is-scalar.html">is_scalar</a> — 检测变量是否是一个标量</li><li><a href="function.is-string.html">is_string</a> — 查找变量的类型是否是字符串</li><li><a href="function.isset.html">isset</a> — 检测变量是否已声明并且其值不为 null</li><li><a href="function.print-r.html">print_r</a> — 打印人类可读的变量信息</li><li><a href="function.serialize.html">serialize</a> — 生成值的可存储表示</li><li><a href="function.settype.html">settype</a> — 设置变量的类型</li><li><a href="function.strval.html">strval</a> — 获取变量的字符串值</li><li><a href="function.unserialize.html">unserialize</a> — 从已存储的表示中创建 PHP 的值</li><li><a href="function.unset.html">unset</a> — 清除指定变量</li><li><a href="function.var-dump.html">var_dump</a> — 打印变量的相关信息</li><li><a href="function.var-export.html">var_export</a> — 输出或返回变量的可解析字符串表示</li></ul>
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